03-05-2013, 02:46 PM
Hi Guys,
I've got a 48-482 that I received not working (just static) a few months ago. All caps and any questionable resistors have been replaced. All tubes have been double checked. It has been a fill in project. So far I'm just concerned with AM. I got into it again and this is what I found:
I get nice loud static with any type of antenna. Following the directions for alignment I am able to get a good tone at 455Khz and was able to align it. That's as far as it goes. Still static on any dial position. I tried to get a tone at 1000Khz so I set my sig generator and set the radio dial to 1000. Nothing. I tried it again but had the antenna wire connected to one antenna input. This is when the crazy stuff started. Instead of a tone from my sig gen, I picked up a local radio station. As I turned the dial on the signal gen, I was able to pull in all my local AM stations.
What do you think?
Thanks,
Eric
I've got a 48-482 that I received not working (just static) a few months ago. All caps and any questionable resistors have been replaced. All tubes have been double checked. It has been a fill in project. So far I'm just concerned with AM. I got into it again and this is what I found:
I get nice loud static with any type of antenna. Following the directions for alignment I am able to get a good tone at 455Khz and was able to align it. That's as far as it goes. Still static on any dial position. I tried to get a tone at 1000Khz so I set my sig generator and set the radio dial to 1000. Nothing. I tried it again but had the antenna wire connected to one antenna input. This is when the crazy stuff started. Instead of a tone from my sig gen, I picked up a local radio station. As I turned the dial on the signal gen, I was able to pull in all my local AM stations.
What do you think?
Thanks,
Eric
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
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